Hoist



w. LEE AND J. w. SWINDALE.

HOIST. APPLICATION FILED SEPT, TI, I919. 1,366,394, a ted Jan. 25, 1921.

2 SHEETS SHEET I H. W. LEE AND J. W. SWINDALE.

HOIST. APPLICATION FILED SEPT- 11. ms.

Patented Jan. 25, 1921.

2 SHEETS-SHEET 2 if h " tiles from the shell room of a ship to the U'NVITE'D srarjs F'FICE-Q i 'HUGirwAnR NrEn AND i'Jo 'N wrNnLow swIunA E, or NEWCASTLE-'UlON-TYNE, 1 ENGLAND, ASSIGNOR ros n w. e... ARMSTRONG, W'HITWORTH AND COMPANY, LIMITED, onrmwoAsrLE-UroN-rYNE, ENGLAND. I

j Horse,

Application filed. September 11, sle. Serial ru ees-goes.

7 To all ivhom it-may concern:

Be it known that we, HUGH WVARnEN Lee and JOHN WINDLOW SWINDALE, sub ects of the King of Great Britain, residing at Elswick Works, Neweastle-upon-Tyne, England, have invented new and useful Improvements in Hoists,.of which the following is a specification. f f

This invention relates to hoists and especially to those employed for raising pro ecworking chamber or other desired position. A hoist made in accordance with this'invention may obviously'be used for many purposes, but it will be described asadapted for use with projectiles,

According to this invention we provlde a series of lifting arms to which areimparted' reciprocating movements up'and down the trunk and rocking-movements into and out of the path'of the projectiles, and also a series'of retaining arms to which are 1m parted rocking movements into and out or the path of the projectiles.

-' Preferably each series is duplicated, one

' being arranged' on' each side of the center line of the trunk.

hen a projectile is delivered on to the lowest pair of lifting arms it 1s raised by them past the 'lowestpair'of retaming arms which at the moment when the projectile passes has been withdrawn out of the path of the latter and as soon as the projectile has passed the tops of these retaining arms the latter are moved beneath it whereupon the lifting arms are withdrawn from the path of the projectile which is thus left restond projectile has been delivered to the lowing on therlowest retaining arms. All the lifting arms then fall and are rocked so that'they again come into the path ofthe projectile. As the lifting arms are raised the second pair picks up the projectile from the lowest retaining arms and lifts it whereupon it is caught and retained by the second pair of retaining arms, and so on. If a secest pair of lifting arm it will have been raised on to the first pair of retaining arms, and so on.

Our invention is illustrated by the accompanying. drawings, Figure 1 of which is a vertical section through the center line of a.

hoist, Fig. 2 .is a rear elevation partly, in section, Fig; 3 is'a vertical section of part of the hoist in a "planeat right angles to that of Fig.1, and'F ig; J5 is a horizontal section.

Fig. 1 shows the retaining armsin action and the lifting arms out of action movingdownward, whilethe other figures show the lifting arms almost at the top oftheir stroke just as they are relinquishing their loadst'o" the retaining arms.

"1' 1s 'a shaft which can'be driven in f any Specification of Letters Patent, P t dJ 1.

convenient way and is provided with a worm 2 'meshing with a worm wheel 3 fast onia shaft 4 journaled a frame'5. Fast with the worm wheel are twoplates' 6 having in them cam grooves 7 in which work pins 8 on the lower ends of connecting rods 9, the

upperends of which are pivoted" to systems oflinks IO'eXten'ding up the rear of the hoist trunk 11. To these systemsof'links are piv-' oted equally spaced'retaining arms 13, 13, capable of turning 011 pins 14, 14, carried by'the trunk. Fast on the shaft is a pair of'cranks on each of which is a pin 16to' which is pivoted the'lower end'of a rod 17 the upper end of which fis pivoted to a frame 18 carrying four horizontal arms 19 which are secured in'a pair of sliders 20 capable of sliding up, and down-in guides 21 on the trunk. Fasten each cranlrpin' 16 is a pair of plates 22 each of which has in it a cam groove 23 in which Works a pin 24; on a connecting rod 25 the lower end of which is slotted to embrace the crank pin 16, while its upper end is pivoted to a lever arm 26 fulcrumed on a bracket 27 carried by the frame 18 The ends of these arms are pivoted to systems of links 28 similar to the systems '10. To the systems 28 are hinged lifting arms 29 equal in number and equally spaced to the arms 13 and these arms 29 are pivoted at 30, 30, to the sliders 20. 31 are inclined guides down which projectiles may be rolled, and32 is agate carried by a pillar 33 and urged upward into'the path of the projectiles by a spring34. When this gate is depressed a projectile on the guides 31 rolls down through an aperture 35 in the side of the trunk into' the path of the lowest pair of; lifting arms 29. At the of being swung outward by the weight of a projectile so as to let the latter roll'out into a waiting tray 38.

.The action starting from the position shown in Fig.1 is as follows The shaft 4 rotates in the directionshown by the arrow, the arms 13 being at first unaflected owing to the fact that the pins 8 are in circular portions of the grooves 7'. The cranks l5, however,;rotate,= drawin down the frame 18 and the sliders 20. T e pins 24 are then moved out radially from the axes of the crank pins 16 owing to the shape of the grooves 23, the rods25 are moved upward relatively to the pins 16, the arms 26 are therefore rocked upward about their pivots and the systems of links28 are therefore moved upward relatively to the sliders 20, rocking the arms 29 on their pivots and bringing them into their operative positions. As t e cranks 15 continue to rotate, the pins 24 enter the circularportions of the grooves V fore also fall, and the retaining arms 13 are.

rocked inward out of the way of the rising projectile. As, however, the lifting" arms reach their hi hest position the. retaining arms are rocked outward again owing to the shape of the grooves, and when the lifting arms begin to fall the projectile is caught up by successive steps from one pair of lifting arms to the next until it reaches the top,

' whereupon its weight causes the door36'to open an'dit falls into the waiting tray What we claim is I 1 V 1. In a hoist, the combination with a trunk, of a number of retaining arms pivoted to the trunk, a slider movable up and down in the trunk, anumber of lifting arms pivoted to the slider, means for rocking the retaining arms on their pivots, positively movement up and down the trunk, a number of lifting arms pivoted to the slider, positively actuated means for raising and'lowering the slider and positively actuated means for rocking the lifting arms on their pivots. M

In ahoist, the combination of a trunk, a shaft, means for rotatin g the shaft, a cam fast on the shaft, a number of retaining arms pivoted to the trunk, a rod-actuated the cam and adapted to rock the retainin' arms on their pivots, a slider-capable o movement up and down the trunk, a crank arm fast on the shaft means actuated by the rotation of the crank arm for movin the slider up and down, a number of lifting I HUGHWARREN'LEE; JOHN WINDLOW SWINDALE, 

